{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:KZK3GCSMYXTQMJVOMNBV5OXJOD","short_pith_number":"pith:KZK3GCSM","schema_version":"1.0","canonical_sha256":"5655b30a4cc5e70626ae63435ebae970d7c589df0263724f61cf3bc591b58246","source":{"kind":"arxiv","id":"hep-ph/9905392","version":2},"attestation_state":"computed","paper":{"title":"Perturbative Effects in the Form Factor \\gamma\\gamma^*\\to \\pi and Extraction of the Pion Wave Function from CLEO Data","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexander Schmedding, Oleg Yakovlev","submitted_at":"1999-05-18T22:01:18Z","abstract_excerpt":"We study the pion form factor F^{\\pi \\gamma\\gamma^*}(Q^2) in the light-cone sum rule approach, accounting for radiative corrections and higher twist effects.\n Comparing the results to the CLEO experimental data on F^{\\pi \\gamma\\gamma^*}(Q^2), we extract the the pion distribution amplitude of twist-2. The deviation of the distribution amplitude from the asymptotic one is small and is estimated to be a_2(\\mu) = 0.12 \\pm 0.03 at \\mu=2.4 GeV, in the model with one non-asymptotic term. The ansatz with two non-asymptotic terms gives some region of a_2 and a_4, which is consistent with the asymptotic"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"hep-ph/9905392","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1999-05-18T22:01:18Z","cross_cats_sorted":[],"title_canon_sha256":"86b699eabaab6fff4b67cfaf49d9f70db15336eca3aa899c5243d69d3b414f76","abstract_canon_sha256":"36c3a6296ad383e8c3afc98d84ffb9be6c0c5616e0862850546746b993034d81"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:06:05.774942Z","signature_b64":"bNPIe5ke2SVn9jKGuJuVPOA4NRZCnGLAjPBdS6Cx+MJk+iSGxWaZ7gDhxhiwPcbfRgQCHePKC0MZ6qXRSsLUAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5655b30a4cc5e70626ae63435ebae970d7c589df0263724f61cf3bc591b58246","last_reissued_at":"2026-05-18T01:06:05.774310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:06:05.774310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Perturbative Effects in the Form Factor \\gamma\\gamma^*\\to \\pi and Extraction of the Pion Wave Function from CLEO Data","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexander Schmedding, Oleg Yakovlev","submitted_at":"1999-05-18T22:01:18Z","abstract_excerpt":"We study the pion form factor F^{\\pi \\gamma\\gamma^*}(Q^2) in the light-cone sum rule approach, accounting for radiative corrections and higher twist effects.\n Comparing the results to the CLEO experimental data on F^{\\pi \\gamma\\gamma^*}(Q^2), we extract the the pion distribution amplitude of twist-2. The deviation of the distribution amplitude from the asymptotic one is small and is estimated to be a_2(\\mu) = 0.12 \\pm 0.03 at \\mu=2.4 GeV, in the model with one non-asymptotic term. The ansatz with two non-asymptotic terms gives some region of a_2 and a_4, which is consistent with the asymptotic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9905392","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9905392","created_at":"2026-05-18T01:06:05.774425+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9905392v2","created_at":"2026-05-18T01:06:05.774425+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9905392","created_at":"2026-05-18T01:06:05.774425+00:00"},{"alias_kind":"pith_short_12","alias_value":"KZK3GCSMYXTQ","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_16","alias_value":"KZK3GCSMYXTQMJVO","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_8","alias_value":"KZK3GCSM","created_at":"2026-05-18T12:25:49.631198+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD","json":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD.json","graph_json":"https://pith.science/api/pith-number/KZK3GCSMYXTQMJVOMNBV5OXJOD/graph.json","events_json":"https://pith.science/api/pith-number/KZK3GCSMYXTQMJVOMNBV5OXJOD/events.json","paper":"https://pith.science/paper/KZK3GCSM"},"agent_actions":{"view_html":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD","download_json":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD.json","view_paper":"https://pith.science/paper/KZK3GCSM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-ph/9905392&json=true","fetch_graph":"https://pith.science/api/pith-number/KZK3GCSMYXTQMJVOMNBV5OXJOD/graph.json","fetch_events":"https://pith.science/api/pith-number/KZK3GCSMYXTQMJVOMNBV5OXJOD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD/action/storage_attestation","attest_author":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD/action/author_attestation","sign_citation":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD/action/citation_signature","submit_replication":"https://pith.science/pith/KZK3GCSMYXTQMJVOMNBV5OXJOD/action/replication_record"}},"created_at":"2026-05-18T01:06:05.774425+00:00","updated_at":"2026-05-18T01:06:05.774425+00:00"}